Quoted from Lethal_Inc:I did do that. All switches in test test fine. The shooter lane switch tests good also and as soon as a ball is ejected into the shooter lane you can manually plunge the ball as usual. It has to be something with the outhole switch #55 as it doesn't register a ball in the outhole, but tests good? Maybe I just need to adjust it?
My dirty Harry was doing the exact same thing. Turns out the balls had become magnetized. Put new balls in and Bam! problem solved.
I then ordered a trough insert to protect against this in the future.